CVE - CVE-2024-27414

CVE-ID
CVE-2024-27414	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back In the commit d73ef2d69c0d ("rtnetlink: let rtnl_bridge_setlink checks IFLA_BRIDGE_MODE length"), an adjustment was made to the old loop logic in the function `rtnl_bridge_setlink` to enable the loop to also check the length of the IFLA_BRIDGE_MODE attribute. However, this adjustment removed the `break` statement and led to an error logic of the flags writing back at the end of this function. if (have_flags) memcpy(nla_data(attr), &flags, sizeof(flags)); // attr should point to IFLA_BRIDGE_FLAGS NLA !!! Before the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS. However, this is not necessarily true fow now as the updated loop will let the attr point to the last NLA, even an invalid NLA which could cause overflow writes. This patch introduces a new variable `br_flag` to save the NLA pointer that points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned error logic.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/167d8642daa6a44b51de17f8ff0f584e1e762db7 URL:https://git.kernel.org/stable/c/167d8642daa6a44b51de17f8ff0f584e1e762db7 MISC:https://git.kernel.org/stable/c/743ad091fb46e622f1b690385bb15e3cd3daf874 URL:https://git.kernel.org/stable/c/743ad091fb46e622f1b690385bb15e3cd3daf874 MISC:https://git.kernel.org/stable/c/831bc2728fb48a8957a824cba8c264b30dca1425 URL:https://git.kernel.org/stable/c/831bc2728fb48a8957a824cba8c264b30dca1425 MISC:https://git.kernel.org/stable/c/882a51a10ecf24ce135d573afa0872aef02c5125 URL:https://git.kernel.org/stable/c/882a51a10ecf24ce135d573afa0872aef02c5125 MISC:https://git.kernel.org/stable/c/a1227b27fcccc99dc44f912b479e01a17e2d7d31 URL:https://git.kernel.org/stable/c/a1227b27fcccc99dc44f912b479e01a17e2d7d31 MISC:https://git.kernel.org/stable/c/b9fbc44159dfc3e9a7073032752d9e03f5194a6f URL:https://git.kernel.org/stable/c/b9fbc44159dfc3e9a7073032752d9e03f5194a6f MISC:https://git.kernel.org/stable/c/f2261eb994aa5757c1da046b78e3229a3ece0ad9 URL:https://git.kernel.org/stable/c/f2261eb994aa5757c1da046b78e3229a3ece0ad9
Assigning CNA
kernel.org
Date Record Created
20240225	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240225)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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